ZIP Code 94403: San Mateo, CA
County: San Mateo
Coordinates: 37.53950, -122.29980
ZIP Type: Standard
Time Zone: Pacific Time (PT)
This profile provides an in-depth look at ZIP code 94403, serving San Mateo in CA. It lies in San Mateo and supports delivery, planning, and address verification.
| Primary City | San Mateo |
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| ZIP Code | 94403 |
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| County | San Mateo |
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| State | CA |
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| Latitude / Longitude | 37.53950, -122.29980 |
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| ZIP Type | Standard |
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| Time Zone | Pacific Time (PT) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 94403 (not an exact boundary).
Geographic & Administrative Context
For mapping and verification, 94403 is commonly represented around 37.53950, -122.29980. These coordinates help identify the general area within San Mateo, CA.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 94403 for mail delivery and general location reference in
San Mateo,
CA.
This ZIP may extend beyond the city core into nearby communities within San Mateo.
Related ZIP Codes (Nearby)
Explore other postal codes near San Mateo within CA.
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Frequently Asked Questions
What is the primary city for ZIP code 94403?
The primary city for this ZIP code is San Mateo, located in CA.
In which county is 94403 located?
ZIP code 94403 is situated within San Mateo, CA.
What are the coordinates for 94403?
The approximate center point is 37.53950 (Latitude) and -122.29980 (Longitude).
Is ZIP code 94403 active?
This page lists ZIP 94403 as Listed based on the latest refresh date shown above.
Does ZIP 94403 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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Methodology & Data Notes
How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.
Page updated: 2026-01-08